1. The Grand Seiko Heritage Collection introduces two compact, vintage-inspired models—SBGX363 and SBGX365—featuring a 62GS case design, with a 32.3 mm diameter and no bezel for enhanced dial exposure.
2. They are powered by the high-accuracy, quartz Caliber 9F51 movement, offering ±10 seconds/year precision, with a slim profile of 9.0 mm thickness.
3. The dials are designed with “Hana-Ikada” cherry blossom themes—pink for spring and deep blue for moonlit petals—protected by box-shaped sapphire crystals with anti-reflective coating.
4. Crafted with Zaratsu-polished exterior finishes, these watches come with stainless steel bracelets, water resistance of 10 bar, and magnetic resistance of 4,800 A/m, with screw-down crowns and case backs.
Introduction to Grand Seiko’s New Heritage Collection
Grand Seiko has announced two new additions to their Heritage Collection, the SBGX363 and SBGX365, set for release in January 2027, which features the familiar 62GS design. These small and elegant watches are inspired by the brand’s historic automatic watch from 1967. The design notably omits a bezel, enabling more light to reach the dial from multiple angles, enhancing readability and aesthetic appeal.
Design and Dimensions
The watches are crafted from stainless steel and are remarkably small with a 32.3 mm diameter which makes them among the most compact models available. They have a lug-to-lug distance of 39.0 mm and a thickness of only 9.0 mm, achieved by using the 9F51 movement, Grand Seiko’s most compact high-precision quartz caliber. The refined exterior bears Zaratsu finishing, giving the surfaces a sharp, mirror-like shine that is synonymous with the 62GS family.
Dial and Crystal Features
The dial design of both models is rooted in the “Hana-Ikada” motif, reminiscent of cherry blossom petals floating on water. The SBGX363 presents a delicate pink shade that symbolizes the springtime vernal equinox, while the SBGX365 displays a deep, moonlit blue to evoke petals under the night sky. To maintain the pattern’s purity, both dials are simple time-only layouts without date windows. They are protected by a box-shaped sapphire crystal with internal anti-reflective coating, keeping the vintage-inspired profile intact.
Movement and Precision
The watches are powered by the Caliber 9F51, which boasts an accuracy of ±10 seconds per year. This movement retains the hallmark 9F features, including the Twin Pulse Control Motor for precise motion of the heavy hands, and the Backlash Auto-Adjust Mechanism, which ensures the second hand precisely hits each marker. Additionally, the movement has a regulation switch for manual fine-tuning of accuracy during maintenance.
Features and Materials
The timepieces are equipped with a stainless steel bracelet that features a tapered design, fitting comfortably thanks to the 15 mm lug width. They are built for durability with a water resistance rating of 10 bar and magnetic resistance of 4,800 A/m. The screw-down crown and case back further support these features, making the watches suitable for everyday wear.
Availability and Pricing
Grand Seiko plans to release these models across boutiques and select salons internationally in January 2027, with final pricing details to be confirmed closer to launch. The elegant, vintage-inspired design coupled with the high-precision quartz movement makes these watches a compelling choice for collectors and enthusiasts alike.
